45494981 has 6 divisors (see below), whose sum is σ = 52922790. Its totient is φ = 38995656.

The previous prime is 45494971. The next prime is 45495001. The reversal of 45494981 is 18949454.

45494981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 45346756 + 148225 = 6734^2 + 385^2 .

It is not a de Polignac number, because 45494981 - 2¹⁴ = 45478597 is a prime.

It is a super-2 number, since 2×45494981² = 4139586592380722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45494921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 464186 + ... + 464283.

It is an arithmetic number, because the mean of its divisors is an integer number (8820465).

Almost surely, 2^45494981 is an apocalyptic number.

It is an amenable number.

45494981 is a deficient number, since it is larger than the sum of its proper divisors (7427809).

45494981 is an equidigital number, since it uses as much as digits as its factorization.

45494981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928483 (or 928476 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 45494981 is about 6744.9967383239. The cubic root of 45494981 is about 356.9887219300.

Adding to 45494981 its sum of digits (44), we get a square (45495025 = 6745²).

The spelling of 45494981 in words is "forty-five million, four hundred ninety-four thousand, nine hundred eighty-one".